Strong Clutter Suppression for Spaceborne Dual-Channel Sar/Gmti

A novel algorithm of strong clutter suppression for spaceborne dual-channel SAR/GMTI is proposed in this paper. First, the adaptive two-dimensional (2D) channel calibration is performed to calibrate difference between channels. Then, the amplitude correction is performed cell by cell to balance channels amplitude. At last, the refined phase correction based on the selected strong clutter is performed to correct phase error between channels. Through the process, channel error is corrected. Clutter, especially strong clutter, is well suppressed. The validity of the proposed algorithm is verified by GaoFen-3 SAR real data.